Synthesis and biological activities of 2,3-dimethyl-1,4-benzoquinones having alkylthio and arylthio side chains.
作者:KOICHI MORI、KYOKO TAKAHASHI、TAKEO KISHI、HIROTERU SAYO
DOI:10.1248/cpb.35.1270
日期:——
New 2, 3-dimethyl-1, 4-benzoquinones having an alkylthio or arylthio side chain at the 5-position and two alkylthio side chains at the 5-and 6-position were synthesized as possible antimetabolites of coenzyme Q. These compounds were tested for inhibition of coenzyme Q in mitochondrial succinoxidase and reduced nicotinamide adenine dinucleotide (NADH) -oxidase systems, and were found to show greater inhibition of the NADH-oxidase system than of the succinoxidase system. 5, 6-Di-octylthio-2, 3-dimethyl-1, 4-benzoquinone showed greater inhibitory activities than 5-alkylthio-2, 3-dimethyl-1, 4-benzoquinones. 5-Arylthio-2, 3-dimethyl-1, 4-benzoquinones showed potent inhibitory activities towards both enzyme systems.
作为辅酶 Q 的可能抗代谢物,合成了新的 2,3-二甲基-1,4-苯醌类化合物,这些化合物在 5 位有一个烷硫基或芳基硫基侧链,在 5 和 6 位有两个烷硫基侧链。测试了这些化合物对线粒体琥珀氧化酶和还原型烟酰胺腺嘌呤二核苷酸(NADH)-氧化酶系统中辅酶 Q 的抑制作用,发现对 NADH-氧化酶系统的抑制作用大于对琥珀氧化酶系统的抑制作用。5,6-二辛硫基-2,3-二甲基-1,4-苯醌的抑制活性高于 5-烷硫基-2,3-二甲基-1,4-苯醌。5-芳硫基-2, 3-二甲基-1, 4-苯醌对这两种酶系统都有很强的抑制活性。